Apparatus for retarding wagons, tubs, and the like



Nov. 6, 192s. w Y A 1,690,695

B. NORTON APPARATUS FOR RETARDING WAGONS, TUBS, AND THE LIKE Nov. 6, 1928.

B. NORTON APPARATUS FOR RETARDING WAGONS, TUBS, AND THE LIKE Filed spt. 17, 1927 2 Sheetss--Sheetl 2 #rasa @z5 Patented Nov. 6, 1928.

UNITED STA-,TES

BERTRAM NORTON, F CLAVERLEY,

NEAR WOLVERHMPTON, ENGLAND.

APPARATUS FOR RETARDING WAGONS, TUBS, AND THE LIKE. f

Appncmon mea september 17, 1927, sriai No.

This invention relates to apparatus for retarding wagons, tubs, and the like, more especially for use in mining systems and lsimilar purposes, when such wagons or tubs are travelling down inclined ways, and has for its object eli'ectually to control or regulate the speed at any desired position.v

In the accompanying drawings Fig. l is a sectional elevation of the improved retarding apparatus having a tapered groove along the wall of the cylinder constructed according to this invention.

Fig. 2' is a sectional plan on line w-m of Fig. 1.

Fig. 3 is a modification wherein the cylinder bore is tapered.

Fig. 4 is a sectional elevation of a modified form of retarding apparatus wherein the cataract is arranged horizontally and operates through an arm pivotally connected to the plunger.

Fig. 5 is an end elevation in part section of the apparatus shown in Fig. 3.

Fig. 6 is a` side elevation of a further form of retarding apparatus wherein the cataract is inclined to the horizontal with its plunger' t n p the resistance to the transfer of` liquid from engaging the axle. Fig. 7 is a further modification of retarding apparatus wherein the cataract has its plunger provided with a pivoted arm retained in retard posit-ion by a pivoted catch. Fig. 8 is another modification of retarding apparat-us wherein the cataract is pivoted and turned ensemble out of engagement with the wagon axle or body by an under acting le-y ver. In a convenient embodiment of the'invention as represented in Figs. 1 and 2, a cataract 1 is vertically disposed and carried by a -frame 2 at a position below the rails 3. Along the wall of the cylinder4 of the cataract is an upwardly tapering groove 4e which gradually diminishes as it approaches the upper part of the cylinder, and in the late ter moves a piston 5 having a piston rod 6 to the upper end of which are pivotally connected links 7 depending one at each side of the cataract. The lower ends of these links are pivotally connected to a cranked or elbowed extension 8 of an upstandingor jutting impact arm or member 9, which is shown in the normal position for` acting as a retard. The latter is pivotally mounted upon a fulcrum pin 10 carried by al bracket 11 projecting from the frame 2. In the upward stroke of the piston 5, the liquid above same on its $520,239, and in Great Britain January29, 1927.

high pressure side is forced to pass through the groove 4e to the low pressure side, said groove presentinga larger sectionto the liquid when the piston is atfthe commencement of its stroke, so thatthe passage in said groove becoming more restricted, an increas-` ing resistance is offered to the piston and transmitted to the impact arm 9. The cy1inder 4 is open at the lower end to an external chamber 12 which at one side of said cylinder is open to an upper chamber 13 which is disposed above the head end of the cylinder and contains or surrounds a gland 14. When the cylinder 4 and chambers 12 and 13 are filled with oil or other liquid, the gland 14 is immersed. It is preferable that no air be allowed to enter the cylinder, and the provision of the chamber 13 situated around the gland 14 and adapted to containa filling of' oil or l other liquid, ensures that the gland shall alwaysbe immersed and a liquid seal provided against air leakage between the piston rod 6 and the gland 14 of the cylinder 4. In the upper end of the cylinder above the piston 5 is a port 15 which is more or less obtnrated or regulated by an adjustable pin 1G for varying the high pressure side of the. piston to the low pressure side thereof. Theppiston. 5 is provided with an apertureli' lcovered by a hinge flap valve 18. f

In practice, the axle 19 of the wagon engages with the impact arm or member 9 and j swings it over tofthe right from its fulcrum pin 10, thereby raising the piston 5 under re` straint, regulated by the tapering groove 4?, and an increasing resistance is thus presented to the passage of a wagon. Upon the axle 19 passing clear of the impact arm 9, the latter swings back by gravityinto the initial position of a succeeding wagon due to the dead weight ofthe piston transmitted through the links 7 to the cranked or elbowed extension 8. of the impact arm or member 9, since the cen# tre of gravity of the moving parts still lies to the rear or leif't of the fulcrum pin. The

piston 5 in this movement is brought to the' bottomof the cylinder 4 with the iap valve 18l liftingand allowing oil or other liquid at the lower side of the piston to pass through the aperture 17 to the upper side of same.

The lower end of the cataract 1 is formed centrally with a cup Q0 having through one or more of its walls an aperture or apertures 21, and the lower side of the piston 5 is provided with aprojecting boss 22 to engage with any the cup 2O whereby the piston is proviced with a dash pot to give a cushioning ei'iiect to the piston at the leiver end of stroke. rl`he head ot the cylinder is provided with a vent aperture 28 controlled hy a vent pin to permit the initial filling of the cylinder d.; and chamber l2.

Referring to the inodi ication shown in Fig. 3, the cylinder lx is nude with an upward1 J7 taperingbore havingv its larger diameter at the connnencing part ot the piston sti-olie so that there is a graduallj7 reducing passage betueen the walls ot ther-vlinder and the piston 5X. lConseqr-.ently7 a graduallj,T increasing resistance is presented to the said pistonby virtue oit the liquid on` the high pressure side above the piston having to pass through a. inore restricted passage between the piston andi the cylinder ralls as the piston approaches the end of its stroke. The piston rod (SX may be connected through links with an impact a an, as aforesaid.

Referring to the modilication ot the apparatus shown in 4f and 5', the cataract is arranged to operate substzuitiallj7 in a horizontal direction and comprises a cylinder 4v in which u'orlrs a solid piston 5a to which is pivotc lly connected at l an angle abutment lererl having its upper arin adapted to en f 'with the wagon axle 19 and its cranked vsion 8 adapted to serve as slipper ivhich has a slidable enga geinent with a slide- Qf terininating` a short distance trein the MJ iuder 4t so as to provide a slot 25h. The

vpassages through the apertures l,

. i. leu'av 2z may be provided ivith keepers having lateral inturned flanges and the lower euds oit the levers 9 may be formed or pre vided ivith lateral upstanding ribs engaging under the Hangers otl the lizeepers in order to prevent axial deviation ot the pistouV l'r. The c vlinder il is connected by a rondine with an oil or other liquid reservoir and has a return valve 18 so that said conduit under a cgheaduor pressure enabling a, return ol the piston to the retarding position. The cylinder has apertures leuter the outletot liquid at the high pressure side oit the rusten -2 one ot these openings being engaged by a sereiv pin 16a. lt desired., an adjustable pin may engage with each olf the aperlure-:.1Y i5".

ln practice. the axle i9 olV the Wagon ein` gages With the upstanding arm olA the lr El and by Virtue ot the ,torce ar -ig troni momentum ot the Wagon. depres the pis i. 5a into the cylinder il against a pressure whit can be regulated by the more or lees restricted i which coinnunicate With said oil or other liquid reservoir until such tune as the slipper part 8 ot the lever 9" passes beyond the slideuajf" Q5 above th slot 25D, whereupon the levcrtips over on its centre l0 that if' upper arin drops below the level of the lei'r the Wagon axle 1Q and enables reles. ein as shown by 'dotted lines.;

-nient with the Wagen wheels is returned into the retarding position upon the outward st elre oIE the pieton. 5a b); abuti. i nient et the cr nlied extension E .gainst 'the end ofthe slideivay 2'".V ln the modification et' the apparatus shown in Fig. t5, the c; ract is zu a 'ed inclined to an oil orother liquid reservoirj as aforesaid.

cylinder-b is connected by a condrutl and has a return valve 1S". In the` cylinder el" are .apertures l5 open to the rc or more of which apertures 'is or are reg' ted by a screw pin 1Gb. the Wagon mores 'tor-v vvard and dcpresses the cataract piston 5l. the projeeting head oi t ie piston is brought below the level ol" the Wagon axle. as indicated by the dotted lines, whereupon the Wagon. is. tree to pass over. The wagon is retarded. by regulating the passages throughtlie aj'iertures 11V. i

ln the inediti'ation ot" tbe. apparatus sl'iown in Fig. 7. the cata.V act is arranged horiZout-allyT confiisting oft, a cylinder Ll@ in which are apertures lc. tire passages through `which are regulated lj.' screw pins 16C to a reserve'ir under a suitable head. ln the cylinder ivorls a piston 5C on which pivotallj7 mounted a catch 27` having upstanding projections 277 2i", the projections 27a engaging With the lower afin oi tl-ie lever 9 which is pivoted at 10 to said plunger, and the upper arin ot thelever engaging Withthe Wagen axle l5) or body. ri spring 9@ engages with `the impact. arin'f)C to return it to ratz` rd position. it projection 28 is provider at the end oft the cylinder et@ or other j the projection 2? and the catch 27. The cylinder Llc connected b v a conduit with an oil or other liquid reservoir, as aforesaid, and has a return valve 18. As the piston 5C is moved into ythe eylii'ider ll by the forcent the ivagon aille lf) against, the arin or niniber. the projection 2'2") ol catch Qi' brougit into collision with projectien 2S on the cylinder il@ und QT drepped out-ot engagement u'il @against the actie-n et' a spring ,lercrring to the inodilication L itil standing impact a 'in' or ineinber 9 adapted ragen axle if). ,A douv l L.

to engage With the ble arined roeliine lever inthe bracket l and arrzf aria 32 and its other t. n: A n, e2 adapt convenient partfor engagement vfith the Wagon to proceed.

f inde/,r il is connected by a "conduit fillaiiith an obturated by screw pinsy ltl. lnv

Ll, the Wr nr Wheels 34 gage and depr s; the arm 32l oil' the lever 232 and turn 'l leerer about the centre 33 so as to ezeit an upward prssiuc'ttri arm 32 against the undo side ot the cyl# indcr l, whereby the ref end ot the cafaract is swung upwards a ut its trunnions SEO and consequently lowering the outward end oi the piston to a position below the level of the wagon axle thereby allowing The return' of the cataract cylinder to its initial position is a gravitational. one.

ln all cases, the cataract plunger instead ot engaging With the Wagon axle, may eninto the cylinc Y gage with the wagon body or any part ot the undoriframe, to ei'lect a. retardation oli the wagon, as will be understood.

`What I claim is il. Apparatus -lor retardir'` vagone or tubs comprising in combination a c iaract l'iaving a cylinder containing oil or other liquid, a piston Working in the cylinder, means tor restricting the passage of thi-e liquid from the high pressure side of the piston whereby the liquid is permitted to escape under restraint, and a jutt arm or member connected to the piston land adapted 'to project into retar1 K in the path ot a vehicle passing thereover and to more forwardly clear of the vehicle to non-retarding position subject to a relucant movement of the cataract apparatus upon a propellant -torce acting against the impact arm or member, and means 'tor causing the impact arm or member to return to retarding position.

2. Sip] ratas for retarding Wagons or tubs comprising in con'ibination a cataract having a cylinder containing oil or other liquid, a piston Working in the cylinder whereby the liquid permittcdto escape under restraint, a reservoir communicating with the cylinder at one end thereof. and impact arms or members connected with the Vpistoia said arms or membe to jut upwardly to a rctarding posi fr and to more forwardly clear of the Vehicc to uon-retardii 0' g1` 'an sul'iject to i reluciofement of the cataract upon a propellaY t torce acting' against the arms or members, and means tor ca sing the impact :firms or members to return to retarding position.

3. Apparatus for retarding Wagons or tubs comprising in combination a cataract having a cylinder containing oil or other liquid, a piston Working in the cylinder, a tapering groove in the cylinder Walls for the passage p actiomals n 1 the piston trl is forced by thefii'agonai ,li

tidy

impact ding position liquid from the loii' pressure sido of the j piston to the highpres'sure sidethereof to ually movable into retard. igornon ietarfr ngposit-ion. n

Jippfi" 4s for ret-arding Wagons or tubs coniprising in 'combination ay cataract having a" cylinder containing oil oi' other liqjuid", a p1 n `iiorkmgin rthe cylinder Whcre'y the liquid is permitted t'o escape under restraint,

said cylinder being open at one end toa reservoir, upwardly extending impact arms with cranked extension members through Which they are pivotally mounted, links connected to the extension members of the impact arms intermediately ot their ulcrum and the upstanding parts ot said arms, and the upper ends ol the links connected to the piston rodl 5. Apparatus for retarding uf'agons or tubs comprising in combination a cataract having a cylinder containing oil or other liquid, a piston Working in the cylinder whereby the liquid is permitted to escapo under restraint, said cylinder being open at the lower end to a reservoir, a piston provided with a central boss at its lower side, a cup on the inner side ot the cylinderI end with Which cup the piston boss engages,a port in the piston tor the passage of the liquid on the non-Working stroke, means in the cylinder at the high pressure side oi the piston for regulating the escape ot pressure side of the piston, an upstanding impact arm pivotallyy connected with the cataract piston and adapted to project in the path of a vehicle passing thereover, a port in. the piston lor the passage ot the liquid on the return stroke, a port in the cylinder Walls at the high pressure siderot the piston, and an adjustable pin obstructing said port.

7. Apparatus t'or retardingwagons or tubs comprising in combina-tion a cataract haring a cylinder containing oil or other liquid, a`

piston Working Within the cylinder, means for pern'iitting the liquid to escape under restraint :from the high pressure side of the piston, a frame carrying the cataract beneath inclined rails, an upstanding impact# arm having a'cranked lowcrend pivotally connected to the frame, and pivotally connected to the piston, ymeans in the cylinder atthe high pressure side 0In the piston for regulating the escape of liquid on the Working stroke,

and the cylinder at the low pressure side open to a reservoir under a head7 or pressure.

8. Apparatus for retarding Wagons or tubs comprising in combination a cataract having a cylinder containing oil or other liquid, a piston Working in the cylinder, a tapering groove in the cylinder Walls for the passage of liquid from the low pressure side of the piston to the high pressure side thereof to permit said liquid to escape under restraint, said cylinder being open at the 10W pressure end to a reservoir providing a head or pressure therefor and upwardly extending so as to encompass the upper end of the cylinder, a stuffing box and gland at the cylinder head Within the said reservoir so as to eiect an immersion of the gland, and an upwardl7| extending impact arm having a cranked lower extension whereby it is pivotally mounted, and links connecting the said extension With the piston rod.

In testimoni7 whereof, I have signed my name to this specilication at Birmingham, England, this 22nd day of August, 1927.

BER-TEAM NORTON.. 

